Product-focused engineer and former startup CTO building scalable systems in AI, Blockchain, and Fintech. Exploring LLMs, RAG systems, and multi-tenant SaaS.https://lazybuilds.com/https://lazybuilds.com/posts/belief-based-systems/https://lazybuilds.com/posts/belief-based-systems/A document is not a fact. It is a claim. After four months of shipping an AI sales rep, I think the next infra layer is belief-based knowledge systems. Here is the buildup, with one running example, six diagrams, and the papers behind it.Tue, 05 May 2026 00:00:00 GMThttps://lazybuilds.com/posts/part-2-rag-through-wonderland/https://lazybuilds.com/posts/part-2-rag-through-wonderland/Building and optimizing a RAG system for Level 1 factual recall—from 12/30 to 27/30 through iterative improvements in chunking, retrieval, and evaluation.Mon, 17 Nov 2025 00:00:00 GMThttps://lazybuilds.com/posts/part-1-rag-through-wonderland/https://lazybuilds.com/posts/part-1-rag-through-wonderland/Kick off the RAG Through Wonderland series by defining AliceEval and outlining the five-level journey from factual recall to external knowledge synthesis.Mon, 10 Nov 2025 00:00:00 GMThttps://lazybuilds.com/posts/what-is-rag/https://lazybuilds.com/posts/what-is-rag/A practical guide to RAG—what it is, why it matters, benefits, how it works, and trade-offs.Wed, 15 Oct 2025 05:17:19 GMT